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Human pulmonary adiospiromycosis.

J C Watts, C S Callaway, F W Chandler

    Archives of Pathology
    |January 1, 1975
    PubMed
    Summary
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    Emmonsia crescens causes adiaspiromycosis, a lung disease. This study shows the fungus enlarges inhaled spores, forming granulomas, but does not spread within the lungs.

    Area of Science:

    • Mycology
    • Pathology
    • Pulmonology

    Background:

    • Emmonsia crescens is an uncommon fungal pathogen.
    • Adiaspiromycosis is a granulomatous lung disease caused by E. crescens.

    Purpose of the Study:

    • To histopathologically and ultrastructurally evaluate a case of human adiaspiromycosis.
    • To understand the pathogenetic mechanisms of E. crescens in pulmonary infections.

    Main Methods:

    • Histopathologic examination of lung tissue.
    • Ultrastructural analysis of fungal spores.

    Main Results:

    • Pulmonary granulomatosis was observed in response to inhaled E. crescens spores.
    • Spore walls have three zones, with a fenestrated middle layer.

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  • No budding or endosporulation was detected.
  • E. crescens causes local changes via spore enlargement and granuloma formation.

    • Conclusions:

    • The findings support the progressive enlargement of inhaled spores and surrounding granulomas as the primary pathogenetic mechanism.
    • E. crescens does not propagate or disseminate within the lung.